A rare natural variation in TaFT-D2 underlies QTss.cas-3D associated with increased total spikelet number per spike in wheat----中国科学院遗传发育所农业资源研究中心

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论文题目	A rare natural variation in TaFT-D2 underlies QTss.cas-3D associated with increased total spikelet number per spike in wheat
作　　者	柳洪，施志鹏，韩帼豪，张锦鹏，谷田田，王婧，严汉文，邢丽贤，李立会，安调过
发表年度	2024
刊物名称	CROP JOURNAL
卷、期、页码	12; 6; 1727-1734
影响因子
论文摘要	Total spikelet number per spike (TSS) is a crucial yield component in wheat. Dissecting and characterizing major stable quantitative trait loci (QTL) associated with TSS can significantly enhance the genetic improvement of yield potential. In a previous study, we identified a stable major QTL for TSS, named QTss.cas-3D. In the present study, we conducted fine mapping of QTss.cas-3D, interval to approximately 6.35 Mb, ranging from 105.03 to 111.38 Mb, based on the IWGSC RefSeq v2.1. Through genome re- sequencing and gene function annotation, we identified TraesCS3D03G0308000 ( TaFT-D2 ) as the candidate gene. Phenotypic evaluation with paired near-isogenic lines revealed that this locus predominantly increases kernel number per spike by enhancing TSS and fertile spikelet number per spike, without significantly affecting thousand-kernel weight or tiller number. The presence of the TaFT-D2 allele in the parent P3228, which is rare in nature populations, highlights its potential value. This study provides a valuable gene resource and functional marker for wheat molecular breeding aimed at improving TSS and establishes a foundation for gene functional analysis of TaFT-D2. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC- ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
全文链接	http://dx.doi.org/10.1016/j.cj.2024.08.006
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